What is the purpose of a cow "sitting quietly chewing"?

Cows have four chambers to their stomach. They will 'age their nourishment and receive more sustenance in return them in the event that they had just a single stomach. When they convey it move down again to bite, they are re-blending it with an extra arrangement of catalysts. Sitting unobtrusively biting enables the dairy animals to ruminate the sustenance stomach related process.